Versatile and a great alternative to prescription sunglasses, the Cocoons Flip Up Rectangular Sunglasses attach to your eyeglasses for immediate relief from bright sun and glare. Flip down when you head outside, flip em up when you come back in. Lightweight and convenient. Flip Ups are great for everyday use. Flip them up when you go inside flip them down for enhanced visual performance when you are out in the sun! Polar lenses eliminate glare and block 100% of harmful UVA B rays. Polar lenses exceed ANSI Z80.3 2010 UV blocking requirement. Lenses are extremely durable and scratch resistant. Gray lens color is a neutral tint that delivers natural color definition and contrast. Ideal for every day use in bright light conditions where enhanced contrast is not required. 15% LT Blue mirror coat designed to improve the glare cutting properties of the gray lens and increase contrast by absorbing additional levels of blue light. Includes protective vinyl case. Rectangular Size 54 lenses.